Why do my teeth hurt from just getting braces?

The bone is changing: The constant pressure from the braces causes changes at the cellular level in the bone around the teeth, and in the periodontal ligament fibers that anchor the tooth into the bone. This constant pressure causes them to "over-react" and perceive ordinarily normal pressure, like from chewing, to be painful. The pain is typically worts in the first 2 days after the braces are adjusted.

Force on the teeth: When you get braces there is a metal wire that causes force on your teeth to move them in the correct position. This causes very minute amounts of bone to be lost ahead of the tooth to be able to make it move, while bone behind the tooth builds up. This causes pain as you are forcing your teeth to do something it naturally doesnt want to do.

Injury: Applying pressure to the periodontal ligament around teeth from orthodontic tooth movement, in effect, causes some minor injury to that ligament. This creates pain or discomfort as the movement process begins, in effect, a healing response.

ADP: Its from a collection of Adenosine diphosphate in your tissues, an offshoot of the energy cycle. As the adp dissipates, your teeth will feel better. In the meantime, take advil/motrin?Ibuprofen and rinse w warm salt water.